Context Aware Energy Conservation In Pervasive Computing Environments

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Title: Context Aware Energy Conservation In Pervasive Computing Environments
Author: Joseph, Prathiba
Abstract: Extending battery lifetime is one of the most critical and challenging problems in mobile systems . When the mobile device sounds a low battery alarm , the user is given an ultimatum to quickly find a power source or suspend work . The greatest utility of mobile devices is their ability to be used anywhere , and at anytime . But power limitations of these devices seem to hinder this goal . The ever -growing needs of mobile users for increased lifetime of wireless devices imply that emerging wireless systems must be more energy -efficient than ever before . Cyber foraging or remote resource exploitation may be an efficient way to deal with this problem in a pervasive computing environment . Mobile devices can save battery power by migrating tasks to a nearby wired infrastructure or to other wireless devices in the environment with higher battery capacity and processing power . However , this process requires considerable automation to minimize energy consumption and user distraction . Also , a pervasive computing environment is highly dynamic and the contexts in the environment change rapidly as devices enter and leave the network . Thus , it is important that the devices are aware of the changing context and adapt to these changes accordingly . This leads to the challenge of how the devices would detect these changes and secondly how they would adapt to these changes after they are detected . A middleware service framework has been developed and deployed over a network of machines that exploit remote resources . The framework adopts a context -aware approach to make intelligent decisions on task migration . It uses the achievable throughput in an end -to -end path as the context . The throughput achievable to each of the remote devices is measured and stored , and this is used to examine the trade -off between communication power expenditures and the power cost of local processing . For a set of tasks , energy savings of up to 43 % are achieved through this process of context aware energy conservation .
URI: http : / /hdl .handle .net /10106 /450
Date: 2007-08-23


Context Aware Energy Conservation In Pervasive Computing Environments. Available electronically from http : / /hdl .handle .net /10106 /450 .

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